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        data-chapter-title="正则表达式"
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                        Introduction
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                            <b>1.</b>
                        
                        HTML and CSS
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                            <b>1.1.</b>
                        
                        常用的标签
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                            <b>1.2.</b>
                        
                        表格的使用
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                            <b>1.3.</b>
                        
                        表单和新增元素
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                            <b>1.4.</b>
                        
                        a 标签
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                            <b>1.5.</b>
                        
                        盒子模型
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                            <b>1.6.</b>
                        
                        浮动
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                            <b>1.7.</b>
                        
                        css 常见问题
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                            <b>1.8.</b>
                        
                        位置定位
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                            <b>1.9.</b>
                        
                        阴影设置
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                            <b>1.10.</b>
                        
                        动画
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                            <b>1.11.</b>
                        
                        容器居中
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                            <b>1.12.</b>
                        
                        fullpage 的使用
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                            <b>2.</b>
                        
                        gitbook 的安装
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                            <b>3.</b>
                        
                        移动端
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                            <b>3.1.</b>
                        
                        关于移动端
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                            <b>3.2.</b>
                        
                        移动端小问题
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                            <b>4.</b>
                        
                        flex 弹性盒子
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                            <b>4.1.</b>
                        
                        flex 布局
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                            <b>5.</b>
                        
                        响应式布局
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                            <b>5.1.</b>
                        
                        Bootstrap
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                            <b>5.2.</b>
                        
                        媒体查询
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                            <b>6.</b>
                        
                        JavaScript
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                            <b>6.1.</b>
                        
                        JS 数据类型
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                            <b>6.2.</b>
                        
                        数据类型的转换
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                            <b>6.3.</b>
                        
                        运算符
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                            <b>6.4.</b>
                        
                        赋值运算符
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                            <b>6.5.</b>
                        
                        比较运算符
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                            <b>6.6.</b>
                        
                        逻辑操作符
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        <li class="chapter " data-level="6.7" data-path="md/css/JavaScript/7、条件运算符.html">
            
                
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                            <b>6.7.</b>
                        
                        条件运算符
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        <li class="chapter " data-level="6.8" data-path="md/css/JavaScript/8、位运算符.html">
            
                
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                            <b>6.8.</b>
                        
                        位运算符
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        <li class="chapter " data-level="6.9" data-path="md/css/JavaScript/9、条件语句.html">
            
                
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                            <b>6.9.</b>
                        
                        条件语句
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        <li class="chapter " data-level="6.10" data-path="md/css/JavaScript/10、循环语句.html">
            
                
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                            <b>6.10.</b>
                        
                        循环语句
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                            <b>6.11.</b>
                        
                        break 和 continue
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        <li class="chapter " data-level="6.12" data-path="md/css/JavaScript/12、for循环.html">
            
                
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                            <b>6.12.</b>
                        
                        for 循环
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        <li class="chapter " data-level="6.13" data-path="md/css/JavaScript/13、多层循环.html">
            
                
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                            <b>6.13.</b>
                        
                        多层循环
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        <li class="chapter " data-level="6.14" data-path="md/css/JavaScript/14、for-in循环.html">
            
                
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                            <b>6.14.</b>
                        
                        for-in 循环
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        <li class="chapter " data-level="6.15" data-path="md/css/JavaScript/15、try-catch语句.html">
            
                
                    <a href="../../../md/css/JavaScript/15、try-catch语句.html">
                
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                            <b>6.15.</b>
                        
                        try-catch 语句
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        <li class="chapter " data-level="6.16" data-path="md/css/JavaScript/16、函数.html">
            
                
                    <a href="../../../md/css/JavaScript/16、函数.html">
                
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                            <b>6.16.</b>
                        
                        函数
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        <li class="chapter " data-level="6.17" data-path="md/css/JavaScript/17、循环排序.html">
            
                
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                            <b>6.17.</b>
                        
                        循环排序
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        <li class="chapter " data-level="6.18" data-path="md/css/JavaScript/18、es6语法.html">
            
                
                    <a href="../../../md/css/JavaScript/18、es6语法.html">
                
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                            <b>6.18.</b>
                        
                        es6 语法
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        <li class="chapter " data-level="6.19" data-path="md/css/JavaScript/19、数组对象.html">
            
                
                    <a href="../../../md/css/JavaScript/19、数组对象.html">
                
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                            <b>6.19.</b>
                        
                        数组对象
                    </a>
            
            
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        <li class="chapter " data-level="6.20" data-path="md/css/JavaScript/20、date对象.html">
            
                
                    <a href="../../../md/css/JavaScript/20、date对象.html">
                
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                            <b>6.20.</b>
                        
                        date 对象
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="6.21" data-path="md/css/JavaScript/21、Boolean对象.html">
            
                
                    <a href="../../../md/css/JavaScript/21、Boolean对象.html">
                
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                            <b>6.21.</b>
                        
                        Boolean 对象
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="6.22" data-path="md/css/JavaScript/22、数学对象.html">
            
                
                    <a href="../../../md/css/JavaScript/22、数学对象.html">
                
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                            <b>6.22.</b>
                        
                        数学对象
                    </a>
            
            
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        <li class="chapter " data-level="6.23" data-path="md/css/JavaScript/23、对象的创建.html">
            
                
                    <a href="../../../md/css/JavaScript/23、对象的创建.html">
                
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                            <b>6.23.</b>
                        
                        对象的创建
                    </a>
            
            
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            </ul>
            
        </li>
    
        <li class="chapter " data-level="7" data-path="md/css/BOM/BOM.html">
            
                
                    <a href="../../../md/css/BOM/BOM.html">
                
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                            <b>7.</b>
                        
                        BOM
                    </a>
            
            
            <ul class="articles">
                
    
        <li class="chapter " data-level="7.1" data-path="md/css/BOM/1、window对象.html">
            
                
                    <a href="../../../md/css/BOM/1、window对象.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>7.1.</b>
                        
                        window 对象
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="7.2" data-path="md/css/BOM/2、navigator对象.html">
            
                
                    <a href="../../../md/css/BOM/2、navigator对象.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>7.2.</b>
                        
                        navigator 对象
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="7.3" data-path="md/css/BOM/3、screen对象.html">
            
                
                    <a href="../../../md/css/BOM/3、screen对象.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>7.3.</b>
                        
                        screen 对象
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="7.4" data-path="md/css/BOM/4、history对象.html">
            
                
                    <a href="../../../md/css/BOM/4、history对象.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>7.4.</b>
                        
                        history 对象
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="7.5" data-path="md/css/BOM/5、location对象.html">
            
                
                    <a href="../../../md/css/BOM/5、location对象.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>7.5.</b>
                        
                        location 对象
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="7.6" data-path="md/css/BOM/6、cookie对象.html">
            
                
                    <a href="../../../md/css/BOM/6、cookie对象.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>7.6.</b>
                        
                        cookie 对象
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="7.7" data-path="md/css/BOM/7、html5本地存储.html">
            
                
                    <a href="../../../md/css/BOM/7、html5本地存储.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>7.7.</b>
                        
                        html5 本地存储
                    </a>
            
            
        </li>
    

            </ul>
            
        </li>
    
        <li class="chapter " data-level="8" data-path="md/css/DOM/DOM.html">
            
                
                    <a href="../../../md/css/DOM/DOM.html">
                
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                            <b>8.</b>
                        
                        DOM
                    </a>
            
            
            <ul class="articles">
                
    
        <li class="chapter " data-level="8.1" data-path="md/css/DOM/1、DOM介绍.html">
            
                
                    <a href="../../../md/css/DOM/1、DOM介绍.html">
                
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                            <b>8.1.</b>
                        
                        DOM 介绍
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="8.2" data-path="md/css/DOM/2、元素对象.html">
            
                
                    <a href="../../../md/css/DOM/2、元素对象.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>8.2.</b>
                        
                        元素对象
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="8.3" data-path="md/css/DOM/3、DOM事件1.html">
            
                
                    <a href="../../../md/css/DOM/3、DOM事件1.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>8.3.</b>
                        
                        DOM 事件 1
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="8.4" data-path="md/css/DOM/4、DOM事件2.html">
            
                
                    <a href="../../../md/css/DOM/4、DOM事件2.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>8.4.</b>
                        
                        DOM 事件 2
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="8.5" data-path="md/css/DOM/5、移动端事件.html">
            
                
                    <a href="../../../md/css/DOM/5、移动端事件.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>8.5.</b>
                        
                        移动端事件
                    </a>
            
            
        </li>
    

            </ul>
            
        </li>
    
        <li class="chapter " data-level="9" data-path="md/css/Ajax/Ajax.html">
            
                
                    <a href="../../../md/css/Ajax/Ajax.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>9.</b>
                        
                        Ajax
                    </a>
            
            
            <ul class="articles">
                
    
        <li class="chapter " data-level="9.1" data-path="md/css/Ajax/Ajax的实现过程.html">
            
                
                    <a href="../../../md/css/Ajax/Ajax的实现过程.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>9.1.</b>
                        
                        Ajax 的实现过程
                    </a>
            
            
        </li>
    

            </ul>
            
        </li>
    
        <li class="chapter " data-level="10" data-path="md/css/jQuery/jQuery.html">
            
                
                    <a href="../../../md/css/jQuery/jQuery.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>10.</b>
                        
                        jQuery
                    </a>
            
            
            <ul class="articles">
                
    
        <li class="chapter " data-level="10.1" data-path="md/css/jQuery/1、选择器和效果.html">
            
                
                    <a href="../../../md/css/jQuery/1、选择器和效果.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>10.1.</b>
                        
                        选择器和效果
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="10.2" data-path="md/css/jQuery/2、jQuery属性.html">
            
                
                    <a href="../../../md/css/jQuery/2、jQuery属性.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>10.2.</b>
                        
                        jQuery 属性
                    </a>
            
            
        </li>
    
        <li class="chapter active" data-level="10.3" data-path="md/css/jQuery/3、正则表达式.html">
            
                
                    <a href="../../../md/css/jQuery/3、正则表达式.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>10.3.</b>
                        
                        正则表达式
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="10.4" data-path="md/css/jQuery/4、选择器和操作.html">
            
                
                    <a href="../../../md/css/jQuery/4、选择器和操作.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>10.4.</b>
                        
                        选择器和操作
                    </a>
            
            
        </li>
    

            </ul>
            
        </li>
    
        <li class="chapter " data-level="11" data-path="md/css/VUE/vue.html">
            
                
                    <a href="../../../md/css/VUE/vue.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>11.</b>
                        
                        VUE
                    </a>
            
            
            <ul class="articles">
                
    
        <li class="chapter " data-level="11.1" data-path="md/css/VUE/1、绑定class和style.html">
            
                
                    <a href="../../../md/css/VUE/1、绑定class和style.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>11.1.</b>
                        
                        绑定 class 和 style
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="11.2" data-path="md/css/VUE/2、绑定表单.html">
            
                
                    <a href="../../../md/css/VUE/2、绑定表单.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>11.2.</b>
                        
                        绑定表单
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="11.3" data-path="md/css/VUE/3、组件之间的数据传递.html">
            
                
                    <a href="../../../md/css/VUE/3、组件之间的数据传递.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>11.3.</b>
                        
                        组件之间的数据传递
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="11.4" data-path="md/css/VUE/4、vue-router.html">
            
                
                    <a href="../../../md/css/VUE/4、vue-router.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>11.4.</b>
                        
                        vue-router
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="11.5" data-path="md/css/VUE/style样式.html">
            
                
                    <a href="../../../md/css/VUE/style样式.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>11.5.</b>
                        
                        style 样式
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="11.6" data-path="md/css/VUE/生命周期函数.html">
            
                
                    <a href="../../../md/css/VUE/生命周期函数.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>11.6.</b>
                        
                        生命周期函数
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="11.7" data-path="md/css/VUE/vue-resource.html">
            
                
                    <a href="../../../md/css/VUE/vue-resource.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>11.7.</b>
                        
                        vue-resource
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="11.8" data-path="md/css/VUE/axios.html">
            
                
                    <a href="../../../md/css/VUE/axios.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>11.8.</b>
                        
                        axios
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="11.9" data-path="md/css/VUE/vue动画.html">
            
                
                    <a href="../../../md/css/VUE/vue动画.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>11.9.</b>
                        
                        vue 动画
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="11.10" data-path="md/css/VUE/插槽的使用.html">
            
                
                    <a href="../../../md/css/VUE/插槽的使用.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>11.10.</b>
                        
                        插槽的使用
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="11.11" data-path="md/css/VUE/ajax与框架搭建.html">
            
                
                    <a href="../../../md/css/VUE/ajax与框架搭建.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>11.11.</b>
                        
                        ajax 与框架搭建
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="11.12" data-path="md/css/VUE/计算属性VS侦听属性.html">
            
                
                    <a href="../../../md/css/VUE/计算属性VS侦听属性.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>11.12.</b>
                        
                        计算属性 VS 侦听属性
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="11.13" data-path="md/css/VUE/组件之间数据传递.html">
            
                
                    <a href="../../../md/css/VUE/组件之间数据传递.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>11.13.</b>
                        
                        组件之间数据传递
                    </a>
            
            
        </li>
    

            </ul>
            
        </li>
    
        <li class="chapter " data-level="12" data-path="md/css/阿里巴巴矢量图标库.html">
            
                
                    <a href="../../../md/css/阿里巴巴矢量图标库.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>12.</b>
                        
                        阿里巴巴矢量图标库
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="13" data-path="md/css/ES6/ES6.html">
            
                
                    <a href="../../../md/css/ES6/ES6.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>13.</b>
                        
                        ES6
                    </a>
            
            
            <ul class="articles">
                
    
        <li class="chapter " data-level="13.1" data-path="md/css/ES6/1、promise.html">
            
                
                    <a href="../../../md/css/ES6/1、promise.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>13.1.</b>
                        
                        promise
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="13.2" data-path="md/css/ES6/2、数组的扩展.html">
            
                
                    <a href="../../../md/css/ES6/2、数组的扩展.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>13.2.</b>
                        
                        数组的扩展
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="13.3" data-path="md/css/ES6/3、set的使用.html">
            
                
                    <a href="../../../md/css/ES6/3、set的使用.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>13.3.</b>
                        
                        set 的使用
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="13.4" data-path="md/css/ES6/4、类和类的继承.html">
            
                
                    <a href="../../../md/css/ES6/4、类和类的继承.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>13.4.</b>
                        
                        类和类的继承
                    </a>
            
            
        </li>
    

            </ul>
            
        </li>
    
        <li class="chapter " data-level="14" data-path="md/css/JS、JQ阻止事件冒泡.html">
            
                
                    <a href="../../../md/css/JS、JQ阻止事件冒泡.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>14.</b>
                        
                        JS、JQ 阻止事件冒泡
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="15" data-path="md/css/微信小程序/微信小程序.html">
            
                
                    <a href="../../../md/css/微信小程序/微信小程序.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>15.</b>
                        
                        微信小程序
                    </a>
            
            
        </li>
    


            
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                        <h1 id="&#x6B63;&#x5219;&#x8868;&#x8FBE;&#x5F0F;">&#x6B63;&#x5219;&#x8868;&#x8FBE;&#x5F0F;</h1>
<ul>
<li>&#x7528;&#x6765;&#x5339;&#x914D;&#x4E00;&#x7C7B;&#x6570;&#x636E;&#x7684;&#x6A21;&#x5F0F;</li>
<li><p>&#x8BED;&#x6CD5;&#xFF1A;</p>
<ul>
<li><p>1&#x3001;new RegExp(n)</p>
<ul>
<li>n:&#x8868;&#x793A;&#x9700;&#x8981;&#x5339;&#x914D;&#x7684;&#x6A21;&#x5F0F;</li>
</ul>
</li>
<li><p>2&#x3001;/n/</p>
<ul>
<li>n:&#x8868;&#x793A;&#x9700;&#x8981;&#x5339;&#x914D;&#x7684;&#x6A21;&#x5F0F;</li>
</ul>
</li>
</ul>
</li>
</ul>
<pre><code>            var reg1 = new RegExp(&quot;a&quot;);
            //^&#x8868;&#x793A;&#x5339;&#x914D;&#x4EE5;&#x4EC0;&#x4E48;&#x5F00;&#x5934;&#x7684;&#x5B57;&#x7B26;
            //$&#x8868;&#x793A;&#x5339;&#x914D;&#x4EE5;&#x4EC0;&#x4E48;&#x7ED3;&#x5C3E;&#x7684;&#x5B57;&#x7B26;
            var reg2 = /^a$/;
            var str = &quot;bacd&quot;;
            console.log(reg1.test(str));//true
            console.log(reg2.test(str));//false
            var str1 = &quot;bcd&quot;;
            console.log(reg2.test(str1));//false
            var str2 = &quot;a&quot;;
            console.log(reg2.test(str2));//true

            //[0-9]:&#x8868;&#x793A;0-9&#x4E4B;&#x95F4;&#x4EFB;&#x610F;&#x6570;
            var reg = /^[0-9]/;
            var str = &quot;1ac&quot;;
            console.log(reg.test(str));//true
            var reg = /^[0-9]$/;
            var str1 = &quot;123&quot;;
            console.log(reg.test(str1));//false

            //&#x5339;&#x914D;&#x4E00;&#x4E2A;&#x56DB;&#x4F4D;&#x6570;&#x7684;&#x9A8C;&#x8BC1;&#x7801;
            //[0|9]:&#x8868;&#x793A;0&#x6216;9
            var reg = /^[0|9][0-9][0-9][0-9]$/;
            var str2 = &quot;9596&quot;;
            console.log(reg.test(str2));//true
            var str3 = &quot;45964&quot;;
            console.log(reg.test(str3));//false

            //&#x5339;&#x914D;&#x4E00;&#x4E2A;&#x624B;&#x673A;&#x53F7;&#x7801;
            var reg = /^1[3-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9]$/
            var str = &quot;13118841449&quot;;
            console.log(reg.test(str));//true
</code></pre><ul>
<li>&#x65B9;&#x62EC;&#x53F7;,&#x7528;&#x4E8E;&#x5339;&#x914D;&#x67D0;&#x4E2A;&#x8303;&#x56F4;&#x5185;&#x7684;&#x5B57;&#x7B26;<ul>
<li>[0-9]:&#x6570;&#x503C;&#x7C7B;&#x578B;</li>
<li>[a-zA-Z]:&#x5B57;&#x6BCD;&#x7C7B;&#x578B;</li>
<li>[a-z]:&#x5C0F;&#x5199;&#x5B57;&#x6BCD;</li>
<li>[A-Z]:&#x5927;&#x5199;&#x5B57;&#x6BCD;</li>
<li>[ ^ a-z]: =&gt; ^&#x7B26;&#x53F7;&#x5728;&#x4E2D;&#x62EC;&#x53F7;&#x91CC;&#x9762;&#x8868;&#x793A;&#x975E;&#xFF0C;&#x5373;&#x9664;&#x4E86;a-z&#x4EE5;&#x5916;&#x7684;&#x5B57;&#x7B26;(&#x6240;&#x6709;&#x5B57;&#x6BCD;&#x8DDF;&#x6570;&#x5B57;)&#x3002;</li>
</ul>
</li>
</ul>
<pre><code>            var reg = /^[^a-z]$/
            var str = &quot;1&quot;;
            console.log(reg.test(str));//true

            var str = &quot;&#x4ECA;&#x5929;&#x7684;&#x5929;&#x6C14;&#x771F;&#x597D;!&quot;;
</code></pre><ul>
<li>&#x4FEE;&#x9970;&#x7B26;<ul>
<li>i:&#x4E0D;&#x533A;&#x5206;&#x5927;&#x5C0F;&#x5199;</li>
<li>m:&#x8BC6;&#x522B;&#x6362;&#x884C;&#x7B26;</li>
<li>g:&#x5168;&#x5C40;&#x5339;&#x914D;</li>
</ul>
</li>
</ul>
<pre><code>            var str2 = str.replace(/&#x5929;/g,&quot;&#x65E5;&quot;);
            console.log(str2);
            var str = &quot;hello worLd&quot;;
            console.log(str.replace(/l/ig,&quot;z&quot;));
</code></pre><ul>
<li>&#x5143;&#x5B57;&#x7B26;<ul>
<li>\d &#x8868;&#x793A;&#x4E00;&#x4E2A;&#x6570;&#x5B57;  =&gt; [0-9]</li>
<li>\D &#x8868;&#x793A;&#x975E;&#x6570;&#x5B57;     =&gt; [ ^0-9 ]</li>
<li>\w &#x5355;&#x8BCD;&#x5B57;&#x7B26;        =&gt; [ a-zA-Z0-9_ ]</li>
<li>\W &#x975E;&#x5355;&#x8BCD;&#x7B26;      =&gt; [ ^a-zA-Z0-9_] </li>
<li>\s &#x7A7A;&#x767D;&#x5B57;&#x7B26;(&#x6BD4;&#x5982;&#x7A7A;&#x683C;&#xFF0C;&#x6362;&#x884C;&#x7B26;&#x3002;&#x8FD9;&#x4E9B;&#x770B;&#x4E0D;&#x89C1;&#x7684;&#x5B57;&#x7B26;)</li>
<li>\S &#x975E;&#x7A7A;&#x767D;&#x5B57;&#x7B26;</li>
<li>\b &#x5339;&#x914D;&#x5355;&#x8BCD;&#x8FB9;&#x754C;</li>
<li>\B &#x5339;&#x914D;&#x975E;&#x5355;&#x8BCD;&#x8FB9;&#x754C;</li>
<li>.  &#x8868;&#x793A;&#x4EFB;&#x610F;&#x5B57;&#x7B26;&#xFF0C;&#x9664;&#x4E86;&#x6362;&#x884C;&#x7B26;(\n),&#x7ED3;&#x675F;&#x7B26;(\r);</li>
</ul>
</li>
</ul>
<pre><code>            //&#x53EA;&#x8981;&#x5B58;&#x5728;&#x6709;&#x4E00;&#x4E2A;&#x6570;&#x503C;&#x7C7B;&#x578B;&#x5B57;&#x7B26;&#xFF0C;&#x5C31;&#x8FD4;&#x56DE;true
            var reg = /\d/;
            var str = &quot;1s3&quot;;
            console.log(reg.test(str));//true

            //&#x53EA;&#x8981;&#x5B58;&#x5728;&#x6709;&#x4E00;&#x4E2A;&#x975E;&#x6570;&#x503C;&#x7C7B;&#x578B;&#x5B57;&#x7B26;&#xFF0C;&#x5C31;&#x8FD4;&#x56DE;true
            var reg = /\D/;
            var str = &quot;1s3&quot;;
            console.log(reg.test(str));//true

            var reg = /\w/;
            var str1 = &quot;&#x4ECA;&#x5929;&#x7684;&#x5929;&#x6C14;&#x771F;&#x597D;!&quot;;
            console.log(reg.test(str));//true
            console.log(reg.test(str1));//false

            var str = &quot; &quot;;
            var reg = /\s/;
            if(reg.test(str)){
                console.log(&quot;&#x8BF7;&#x4E0D;&#x8981;&#x8F93;&#x5165;&#x7A7A;&#x683C;&quot;);
            }

            var str = &quot;hwow old are you?&quot;;
            var reg = /w\b/;//&#x5339;&#x914D;&#x4E00;&#x4E2A;&#x5728;&#x5355;&#x8BCD;&#x53F3;&#x8FB9;&#x754C;&#x4E0A;&#x7684;w
            console.log(str.match(reg));//[&quot;w&quot;, index: 3, input: &quot;hwow old are you?&quot;, groups: undefined]

            console.log(str.replace(/w\b/,&quot;W&quot;))

            var str = &quot;hello,how old are you?what?&quot;;
            var reg = /\bh/g;//&#x5339;&#x914D;&#x5355;&#x8BCD;&#x5DE6;&#x8FB9;&#x754C;&#x7684;h
            console.log(str.replace(reg,&quot;H&quot;));//Hello,How old are you?what?
            var reg1 = /\Bh\B/g;//&#x5339;&#x914D;&#x5355;&#x8BCD;&#x975E;&#x5DE6;&#x8FB9;&#x754C;&#x7684;h
            console.log(str.replace(reg1,&quot;H&quot;));//hello,how old are you?wHat?


            var reg = /./;
            var str1 = &quot;12fsghdfgh&quot;;
            console.log(reg.test(str1).);//true


//            var str2 = &quot;\n&quot;;
            var str2 = &quot;\r&quot;;
            console.log(reg.test(str2));//false

//            var str2 = &quot;\n465161&quot;;
            var str2 = &quot;\r464146&quot;;
            console.log(reg.test(str2));//true
</code></pre><ul>
<li>&#x91CF;&#x8BCD;<ul>
<li>{n} &#x8868;&#x793A;&#x6709;n&#x4E2A;</li>
<li>{n,m} &#x8868;&#x793A;&#x6709;n&#x5230;m&#x4E2A;</li>
<li>{n,} &#x8868;&#x793A;&#x5927;&#x4E8E;&#x7B49;&#x4E8E;n&#x4E2A;</li>
<li>? &#x8868;&#x793A;0&#x4E2A;&#x6216;1&#x4E2A; =&gt; {0,1}</li>
<li><ul>
<li>&#x8868;&#x793A;1&#x4E2A;&#x6216;&#x591A;&#x4E2A; =&gt; {1,}</li>
</ul>
</li>
<li><ul>
<li>&#x8868;&#x793A;0&#x4E2A;&#x6216;&#x591A;&#x4E2A; =&gt; {0,}</li>
</ul>
</li>
</ul>
</li>
</ul>
<pre><code>                //&#x5339;&#x914D;&#x624B;&#x673A;&#x53F7;&#x7801;
                var reg = /^1[3-9]\d{9}$/;
                var str = &quot;13118841449&quot;;
                console.log(reg.test(str));//true
                var reg = /^\d{4,6}$/;
                var str = &quot;1234&quot;;//true
                var str1 = &quot;1234567&quot;;//false
                console.log(reg.test(str));
                console.log(reg.test(str1));
                var reg = /^\d{6,}$/;
                var str = &quot;123456789234567367&quot;;
                console.log(reg.test(str));//true
                var reg = /^\d.?$/;//&#x8868;&#x793A;&#x5339;&#x914D;&#x6570;&#x5B57;&#x540E;&#x9762;&#x8DDF;&#x7740;&#x4E00;&#x4E2A;&#x6216;0&#x4E2A;&#x4EFB;&#x610F;&#x5B57;&#x7B26;
                var str = &quot;1s&quot;;
                console.log(reg.test(str));//true
                var reg = /^\d+$/;//&#x8868;&#x793A;&#x5339;&#x914D;&#x4E00;&#x4E2A;&#x6216;&#x591A;&#x4E2A;&#x6570;&#x5B57;
                var str = &quot;123&quot;;
                console.log(reg.test(str));
                var reg = /^.*$/;//&#x8868;&#x793A;&#x5339;&#x914D;0&#x4E2A;&#x6216;&#x591A;&#x4E2A;
                var str = &quot;\n&quot;;
                console.log(reg.test(str));
</code></pre><ul>
<li>&#x6B63;&#x5219;&#x8868;&#x8FBE;&#x5F0F;&#x7684;&#x65B9;&#x6CD5;<ul>
<li>1&#x3001;test()&#x7528;&#x6765;&#x5339;&#x914D;&#x6B63;&#x5219;&#x8868;&#x8FBE;&#x5F0F;&#x4E2D;&#x6307;&#x5B9A;&#x7684;&#x5B57;&#x7B26;&#xFF0C;&#x8FD4;&#x56DE;&#x5E03;&#x5C14;&#x503C;&#x3002;</li>
<li>2&#x3001;exec()&#x5339;&#x914D;&#x5B57;&#x7B26;&#x4E32;&#x4E2D;&#x6307;&#x5B9A;&#x7684;&#x503C;&#xFF0C;&#x5E76;&#x8FD4;&#x56DE;&#x8BE5;&#x5B57;&#x7B26;&#x548C;&#x8BE5;&#x5B57;&#x7B26;&#x6240;&#x5728;&#x7684;&#x4E0B;&#x6807;&#x503C;&#x3002;<ul>
<li>&#x6CE8;&#x610F;&#xFF1A;&#x8BE5;&#x65B9;&#x6CD5;&#x53EA;&#x80FD;&#x5339;&#x914D;&#x4E00;&#x6B21;&#xFF0C;&#x53EA;&#x80FD;&#x83B7;&#x53D6;&#x5230;&#x7B2C;&#x4E00;&#x4E2A;&#x76EE;&#x6807;&#x5B57;&#x7B26;</li>
<li>&#x5982;&#x679C;&#x8981;&#x5339;&#x914D;&#x5230;&#x6240;&#x6709;&#x7684;&#x8BE5;&#x5B57;&#x7B26;&#xFF0C;&#x9700;&#x8981;&#x5168;&#x5C40;&#x5339;&#x914D;&#xFF0C;&#x7136;&#x540E;&#x518D;</li>
<li>&#x8FDB;&#x884C;&#x591A;&#x6B21;&#x5339;&#x914D;&#xFF0C;&#x5C31;&#x80FD;&#x591F;&#x83B7;&#x53D6;&#x5230;&#x6240;&#x6709;&#x76EE;&#x6807;&#x5B57;&#x7B26;&#x3002;</li>
</ul>
</li>
<li>&#x4F8B;&#x5982;&#xFF1A;&#x770B;&#x4E0B;&#x9762;&#x4F8B;&#x5B50;</li>
</ul>
</li>
</ul>
<pre><code>                var str = &quot;&#x5929;&#x554A;&#xFF0C;&#x4ECA;&#x5929;&#x5929;&#x6C14;&#x6674;&#x6717;&#xFF0C;&#x6211;&#x4EEC;&#x6765;&#x4E0A;&#x8BFE;&#x4E86;!&quot;;
                var reg = /&#x5929;/g;
                console.log(reg.exec(str));//[&quot;&#x5929;&quot;, index: 1, input: &quot;&#x4ECA;&#x5929;&#x5929;&#x6C14;&#x6674;&#x6717;&#xFF0C;&#x6211;&#x4EEC;&#x62C9;&#x4E0A;&#x8BFE;&#x4E86;!&quot;, groups: undefined]
                console.log(reg.exec(str));//[&quot;&#x5929;&quot;, index: 2, input: &quot;&#x4ECA;&#x5929;&#x5929;&#x6C14;&#x6674;&#x6717;&#xFF0C;&#x6211;&#x4EEC;&#x62C9;&#x4E0A;&#x8BFE;&#x4E86;!&quot;, groups: undefined]
</code></pre><ul>
<li>&#x65B9;&#x6CD5;&#xFF1A;toString(),&#x4E0D;&#x662F;&#x7528;&#x6765;&#x5339;&#x914D;&#x7684;<ul>
<li>&#x8FD4;&#x56DE;&#x6B63;&#x5219;&#x8868;&#x8FBE;&#x5F0F;&#x5339;&#x914D;&#x7684;&#x5B57;&#x7B26;&#x4E32;</li>
</ul>
</li>
</ul>
<pre><code>                var reg = /&#x6211;&#x4EEC;&#x6765;&#x4E0A;&#x8BFE;&#x4E86;/;
                console.log(reg.toString());
</code></pre><ul>
<li>&#x5B57;&#x7B26;&#x4E32;&#x4E2D;&#x5177;&#x6709;&#x6B63;&#x5219;&#x5339;&#x914D;&#x7684;&#x65B9;&#x6CD5;:<ul>
<li>1&#x3001;replace()</li>
<li>2&#x3001;match()&#xFF0C;&#x8FD4;&#x56DE;&#x4E00;&#x4E2A;&#x5305;&#x542B;&#x76EE;&#x6807;&#x5B57;&#x7B26;&#x7684;&#x6570;&#x7EC4;&#x3002;</li>
<li>3&#x3001;search(),&#x68C0;&#x7D22;&#x4E0E;&#x6B63;&#x5219;&#x8868;&#x8FBE;&#x5F0F;&#x76F8;&#x5339;&#x914D;&#x7684;&#x503C;<ul>
<li>&#x8FD4;&#x56DE;&#x7B2C;&#x4E00;&#x6B21;&#x51FA;&#x73B0;&#x76EE;&#x6807;&#x5143;&#x7D20;&#x7684;&#x4E0B;&#x6807;&#x503C;</li>
</ul>
</li>
<li>4&#x3001;split()&#x628A;&#x5B57;&#x7B26;&#x4E32;&#x5206;&#x5272;&#x4E3A;&#x5B57;&#x7B26;&#x4E32;&#x6570;&#x7EC4;</li>
</ul>
</li>
</ul>
<pre><code>                var str = &quot;&#x5929;&#x554A;&#xFF0C;&#x4ECA;&#x5929;&#x5929;&#x6C14;&#x6674;&#x6717;&#xFF0C;&#x6211;&#x4EEC;&#x6765;&#x4E0A;&#x8BFE;&#x4E86;!&quot;;
                var reg = /&#x5929;/g;
                console.log(str.match(reg));
                console.log(str.search(reg));
                console.log(str.split(/&#xFF0C;/));
</code></pre><ul>
<li>&#x9AD8;&#x7EA7;&#x5E94;&#x7528; =&gt; &#x53CD;&#x5411;&#x5F15;&#x7528;<ul>
<li>&#x5982;&#x679C;&#x6211;&#x4EEC;&#x9700;&#x8981;&#x7528;&#x5230;&#x5339;&#x914D;&#x5230;&#x7684;&#x6570;&#x636E;</li>
<li>&#x53EF;&#x4EE5;&#x5728;&#x5339;&#x914D;&#x6A21;&#x5F0F;&#x7684;&#x6570;&#x636E;&#x4E0A;&#x6DFB;&#x52A0;&#x4E00;&#x4E2A;&#x5C0F;&#x62EC;&#x53F7;</li>
<li>&#x5C0F;&#x62EC;&#x53F7;&#x91CC;&#x9762;&#x7684;&#x503C;&#x53EF;&#x4EE5;&#x7528;&#x4E2A;$&#x52A0;&#x6570;&#x5B57;&#x6765;&#x62FF;&#x5230;</li>
<li>&#x7B2C;&#x4E00;&#x4E2A;&#x62EC;&#x53F7;&#x91CC;&#x9762;&#x7684;&#x5185;&#x5BB9;&#x7528;$&#x52A0;&#x6570;&#x5B57;1,&#x7B2C;&#x4E8C;&#x4E2A;&#x62EC;&#x53F7;&#x8FDE;&#x7684;&#x5185;&#x5BB9;&#x7528;&#x6570;&#x5B57;2&#xFF0C;&#x7B2C;&#x4E09;&#x4E2A;&#x62EC;&#x53F7;...3&#xFF0C;&#x4EE5;&#x6B64;&#x7C7B;&#x63A8;</li>
<li>&#x6BD4;&#x5982;&#xFF1A;<pre><code>/(.{3})/g =&gt; $1
/(.{3})(\d))/g =&gt; $1 $2
</code></pre></li>
</ul>
</li>
</ul>
<pre><code>var str = &quot;123abc789&quot;; // 123 abc 789
var newStr = str.replace(/(.{3})/g,&quot;$1 &quot;);
console.log(newStr);
</code></pre>
                    
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